The concept of reciprocal refers to setting a number mathematically, whose product x is 1 and recorded as 1/x, and the process is "multiplication inverse". All numbers except 0 have reciprocal, the numerator and denominator are in opposite phases, all numbers whose product is 1 have reciprocal, and 0 has no reciprocal.

Reciprocal solution:

1, the reciprocal of the true and false score. It's simple. Commutator numerator and denominator are reciprocal of true fraction and false fraction.

2. The reciprocal of an integer. Integer as denominator, 1 as numerator. Is the reciprocal of an integer.

3, the reciprocal of the decimal. For the reciprocal of divisible number, you can divide by 1 to find the reciprocal, for uncountable number, convert the component number, and then find the reciprocal according to the method of true and false fraction.

4, and the reciprocal of the score. First, turn the fraction into a false fraction, and then switch the numerator and denominator, which is the reciprocal of the number.

Reciprocal of real numbers:

1. To find the reciprocal of a fraction, say 3/4, we only need to exchange the numerator and denominator of 3/4, that is, the reciprocal of 3/4 is 4/3.

2. To find the reciprocal of an integer, we only need to regard this integer as a fraction with a denominator of 1, and then we can get it by finding the reciprocal of the fraction, for example, 12, that is, 12/ 1, and then exchange the numerator and denominator of this fraction to make a numerator. That is, the reciprocal of 12 is112.

3. The reciprocal is its own number, which is 1 and-1. The reciprocal of a positive number is a positive number, the reciprocal of a negative number is a negative number, and 0 has no reciprocal.